Hand grip

Abstract

Provided is a hand grip including a first and second operating arms capable of moving toward and away from each other, a first and second connection arms disposed between the first and second operating arms to be inclined, of which both ends rotatably connected to the first and second operating arms, a spring member installed to provide an elastic force in a direction interfering with approach of the first and second operating arms, a spring fixing part formed to extend upward from the first operating arm and to which one end of the spring member is fixed, a spring connection part formed to extend from an upper end of the first connection arm and to which the other end of the spring member is fixed, and a strength adjusting part formed in the spring connection part and configured to allow the other end of the spring member to move.

What is claimed is: 
     
       1. A hand grip comprising:
 a first operating arm and a second operating arm connected to perform a movement of approaching each other and being spaced apart from each other; 
 a first connection arm disposed between the first operating arm and the second operating arm to be inclined and having both ends rotatably connected to the first operating arm and the second operating arm; 
 a second connection arm disposed under the first connection arm to be inclined in a direction which is the same as that of the first connection arm and having both ends rotatably connected to the first operating arm and the second operating arm; 
 a spring member installed to provide an elastic force in a direction interfering with approach of the first operating arm and the second operating arm; 
 a spring fixing part formed to extend integrally upward from the first operating arm, wherein one end of the spring member is fixed to an upper end of the spring fixing part; 
 a spring connection part formed integrally with the first connection arm and extending obliquely from an upper side of the first connection arm in an outer direction of the hand grip, wherein the spring connection part has a strength adjusting part to which the other end of the spring member is fixed and the spring member is obliquely disposed between the spring fixing part and the spring connection part, and wherein when the first and second operating arms approach each other the spring connection part rotates away from the spring fixing part about a first upper rotary shaft connecting the first operating arm and the first connection arm; 
 wherein the strength adjusting part is formed in the spring connection part along the longitudinal direction of the spring connection part and configured to adjust the strength of the spring member by adjusting the position of the other end of the spring member along the longitudinal direction of the spring connection part. 
 
     
     
       2. The hand grip of  claim 1 , wherein the strength adjusting part includes:
 a rotating engaging member rotatably installed along a longitudinal direction of a hollow hole of the spring connection part and having a knob configured to allow a rotating operation; and 
 a moving part coupled to the rotating engaging member to move along an axial line direction of the rotating engaging member during rotation of the rotating engaging member and to which the other end of the spring member is fixed. 
 
     
     
       3. The hand grip of  claim 1 , further comprising a gap adjusting part including:
 an insertion hole formed to penetrate the first operation arm from outside to inside of the first operation arm, the insertion hole extending toward the upper side of the first connection arm, 
 a nut part provided in the insertion hole and having a screw thread on an inner diameter; and 
 a rotation restriction member coupled to the first operation arm through the insertion hole, the rotation restriction member including a bolt body part screw-engaged with the nut part and a rotating knob for rotation operation disposed in an end of the rotation restriction member, the rotating knob being positioned in an outer side of the first operation arm; 
 wherein the rotation restriction member is configured to adjust the depth inserted through the insertion hole by the rotation operation and is configured such that an inner end portion comes into contact with the upper side end of the first connection arm to restrict a rotating range in which the first connection arm rotates in a returning direction in the release state in which the force applied to the first operating arm and the second operating arm is removed. 
 
     
     
       4. The hand grip of  claim 3 , wherein:
 the gap adjusting part further includes a compression spring being installed in the rotation restriction member, the compression spring being supported between the rotation knob and the first operation arm to provides an elastic force against an engaging direction of the rotation restriction member.